Oyster-dredge.



A. H. VAN SCIVER.

. OYSTER DREDGE.

APPLICATION nun JUNE 18, 1914.

1,172,325. Patented Feb. 22,1916.

2 SHEETSSHEET I.

WIT/VESSESE INVENTOH 29 A TTOR/YEY A. H. VAN SCIVER.

OYSTER DREDGE.

APPLICATION FILED JUNE I8, 1914.

1,172,325. Patented Feb. 22,1916.

Q 2 SHEETS-5HEET 2- Z A'TTORIVEY WITNESS/58:. I 1 my R wzfi gz v THE bDLUMBm PLANOGRAPH CO., WASHINGTON. D. c.

Application file i To alt @050??? it ma concern Be it known that I, ABRAHAMI 9 Server, citizen of the UnitedjStates; residing certain; new and useful jI-rnproxfernientS, i in q aOyster Drfedges; and I doYhereby'declarethe i 3 following to I be ,a. full, clear; and exact description of the invention; such as willfien- :able' others skilled in the art (to which it appertainsto makeanduse the same. j

l 'tes to 1 an improvement y i r ntion i e finoyster dredgesj.

been the custonito iorni the neck of dredges j by a'n elongationpf'the side trarnesjfand center bar and rivet these elongated partsltov.

- the '7 dredge breaks :at. this point; r it is; ii'ecessary to nakefa new' setiofflsideBfrarnesem tire; in fact," practically rebuild; thegdredge. I myiimp o r g h 'aridthe semeste aisgintegmi 3 v short timetorfracturefabuilt which A cannotoc'curf in a solid one. x I.

r Referring toith drawmgs]fFigure1represents a side elevationhofg the dredge Fig.

per plan {View of the; dredge with the shoes of the rear J;The principal"improvedflfeature I ,dredge, overwthe structure shown; 111 my 410imarit m i I I 1 lfroun'd in cross section the better toi pass over theroller of a'gv'essel; (not shown the two upper side frames' ean Q side frarnes are attached fthe semen testa t.

. at: Providence, ,imtheeomityM Providence and "State F of Rhode lsland,'ylghave"invented} 4 ee in nmate- "590,712," dated jS'eptembe'r 28; 1897 it has gether: iThis hasff provedj the jfweakest are t efd dge Lee th b e k alw ys Oc ur fthrough the hrivet {holes ,oflthe neck? )Whe L with jthe jeck and a continuation ofthe same}: The upper and lower sideframes are rivetedtotheicen i j terfbar back er thefneck portion. 'fDredges arehauled in when the vessel is going atfull speed, and thepart. of the} dredge yto flfirstf strike the roller; on the vessel;is .the;neck,h. which i it does fwith fa {I force fsuifieientl in a .2 is an enlarged detail side elevation of tll elf ,yintegral necka'and center bar 3 \is an enlarged detail upper plan "viewer the in tegral neck and centerbar; Fig; an up i it ,fjofthe lower Side traines ornitted;yand Fig; f [51'is an enlargedjdetail'bro'kenside elevation 'd 1 connection at the neck and blade, have been r 3 made straight. This arrangement threw'the neck'down and the blade in a vertical position which caused the dredge todraw on hove-identified patent;liesinthefsolidjneclp i T :overcorne this trouble by forming an uphe it fiat portion 2 backyof the neck andmtegral frnediate of their ends at about the pointb, therewithserves the. purpose of 3a eenter qconnected. tof the cross brace rod 3' secured to d =These ider "part T OFFICE 3 j civnngor rsevi mc -mr pa ISLAND.

. f 2 of the centerbar bythe rivets 6 passing [VA through holes 7,.Fig. 2 of the'center bar. The lower side frames 8 and 9 are alsosecured tothe lower portion of the widened part of .the center bar by the rivets 10. passing through holes ll, Fig. 2... WVhen these upper andlower side framesare thus secured to .the center bar as shown,thewider partf2 of said bar will project above the neck' and the forward connecting point of the lower side frames to form-the comb 12. This comb serves the purpose ofrighting the dredge should it be hauled in bottom side up.; other :words, if the dredge should come 1n bottom'side up, this narrow comb inacontacting with the horizontal roller of thevesselj (not shown) will roll the dredge over. This righting movement is assisted by the contact of the apex wet the angle formed bylthe upper side frames with the centen .bar' 2 3 when said apex: contacts with the verticalroller (not shown) on the boat.

The lower side frames connect. with the .Eldj F113; carrying. :the teeth 14:, through: the

over the ships roller.

lightness to the dredge and are connected to thecenter bar 2 by the braces 19-and 20. Cross braces 21 and 22 stiffen the lower side framesand four verticalbracestwo,

I The upper side frames 4 and 5 are made of angle iron to impart both strength andmedium of the bolts 15.v The side bows 16.. i

*andhl? also connect the uppere side frames '54 'andidwith said bolts. A shoelS, one only ybeingshown, is' attached to the rear end of the lower side frames and to the bolts 15 to '85 Y protect the teeth when the dredge passes blade withlthe forward end of the center bar. 2, as shown.

As is shown in my Patent No. 590,712; heretofore the lower side frames, from their Figs. 1 and 5. This will carry the neck of the dredge up and also bring the blade 13 in a horizontal position and cause the dredge to draw easier. The teeth project the mud 011 1 From th nforegqii gg esc ip ion i 'fwin re'adi'ly vbe seen ithitt lightness I and? Strengt thereby;

vhat ela-i-nlfis z 7 i frafnes connected to the-center ban -:1

one piece'of metalythe' centerba nbeing fiatjt enedfand-having the forward "portion thereof 'eleva'tedgf eb OXQEthG neck to form n .bar' 5nd "Whose 'u'ppe'r' faces are practically on "a g'line [with the upper edge fithe' lcentier 'bai ia 'toothed blade, and bdws'rconn'ecting t the blade with said frames? .np'per' angle firon sido iopjie of this pate nt nlay be obt eined tor f.4 j1' 72,325 f I V in}; dOWIihZaTd at right an iesftithg ygiggig 'j;nggt a 41," fifiie n q b l p siti n ilthe b de; {will serve .to limitthe I depth; of the-teeth in f sand nnd more oysters illthns' ape eernbined in my improved dredge; and t itsj t .l z stlngf qu a l'ltles' f greatly enhanced :f -"HaVinfg thus-, nny inhenti om li" dge of the character deserib'edf: {solid "meek; and x'cen'ter bar; ,one'pie'ce, the-forward-peft of e. "thezcnt rabap 'eleviztednbove the {neck tof i cornprising} a:-"solid;neck and center: bard."

V redge righting icombinppei'wfside frames made ffapgle npn-whose' forward-ends are secu1 edtd'ithe'jc'omb pprtlon 'ofathe eenter:

bar being 'tflattened; said bar being widened. adjacentthejneek fto provide an ,outwardly projecting dredge-rightin g comb, L

n he ente 'f 'har, "andn scraper bar pail-pied frames-.31 .7

rLdredgeicomprising a neck formed.

of z Tsingle piece 10f material that is trans- I verselysfoundedgand: having ahflattened, j2;. 11T ill-dredge efathe chal'ztcteri deseiih 1 f n a-m the, r,

e frames havlng their, ends Connected I -40 4;;A {dredgeeoniprisingnn integral neek t- 1andr eenter bar', up.per andglqwer sidejfranies fl havingi'theii;forwards-ends cbnnectejd to the 7 center bii'r adj ac'en't the neck, -a"s'eraper bar 7 V connected to.jjthe?l'rean ends iiofflthe side 7 frames, and 'semper bar shielding "shoes" can- 1 lfied by jthereit '{portions 0f the 10 ensidej and si'dejfmmes atta ched 'to the center bar.

6.; A; dredge comprisingfa neCk;and' a Y centerbin. integral; therewith, thefneekbe ing transversely rounded Land 7 longituditnall y unwed; the center-bar being-1 fl zit tened and: sideiaframes 1, attached to m tal- 11, 'proximity-t0:the neck. In testimonyf wheredf I'a'ffix'my. signature tinipres encewbf two witnesse'sg; I 1 r e HAM- VAN CWER Y 

